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vovangra [49]
3 years ago
14

Each hour, the temperature dropped by 3 1/2 degrees. What was the change in temperature in 2 1/2 hours?

Mathematics
2 answers:
Hunter-Best [27]3 years ago
6 0

Answer:

8 3/4 degrees

Step-by-step explanation:

In 1 hour, the temperature drops 3 1/2 degrees.

In 2 1/2 hours, the temperature drops 2 1/2 times 3 1/2 degrees.

We need to multiply 2 1/2 by 3 1/2.

2 1/2 * 3 1/2 =

Change both mixed numerals into fractions.

= (2 + 1/2) * (3 + 1/2)

= (4/2 + 1/2) * (6/2 + 1/2)

= 5/2 * 7/2

= 35/4

= 8 3/4

Answer: The temperature change in 2 1/2 hours was 8 3/4 degrees.

Leokris [45]3 years ago
5 0

Multiply the change per hour by the number of hours:

3.5 degrees per hour x 2.5 hours = 8.75

Since the temperature dropped, the change would be a negative value.

The change was -8.75 ( -8 3/4) degrees.

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4(-3x-5)-(10+4x) simplify
bixtya [17]

Answer:

-16x - 30

Step-by-step explanation:

4(-3x - 5) - (10 + 4x) = 4*(-3x) - 4*5 + (-1)*10 + (-1)*4x

                               = -12x - 20 - 10 - 4x   {add like terms}

                               = -12x - 4x - 20 - 10

                               = -16x - 30

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4 years ago
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What is 90% round to the thousandth place
vlabodo [156]

Answer:

0.900?

Step-by-step explanation:

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3 years ago
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You are making 8 cups of fruit punch for a party. You have bottles of 75% fruit juice and 25% fruit juice. How many cups of each
slavikrds [6]

Answer:

<em>4 cups of 75% fruit juice and 4 cups of 25% fruit juice should be mixed.</em>

Step-by-step explanation:

Suppose, the amount of 75% fruit juice is x cups.

As the total amount of fruit punch is 8 cups, so the amount of 25% juice will be:  (8-x) cups.

Given that, the percentage of juice in 8 cups fruit punch is 50%

So, the equation will be.........

0.75x+0.25(8-x)= 0.50(8)\\ \\ 0.75x+2-0.25x= 4\\ \\ 0.50x+2=4\\ \\ 0.50x= 2\\ \\ x=\frac{2}{0.50}=4

Thus, the amount of 75% fruit juice is 4 cups

and the amount of 25% fruit juice is (8-4)= 4 cups.

3 0
3 years ago
19. A computer store used a markup rate of 120%. Find the selling price of a computer game that cost the
Scilla [17]

Answer:

The computer game would sell for $30.

Step-by-step explanation:

25 (1.20) = 30

3 0
3 years ago
What is the solution to the following system of equations? 3x-4y=35 and 3x+4y=5
natta225 [31]
3x - 4y = 35
3x + 4y = 5
------------------add
6x = 40
x = 40/6 which reduces to 20/3

3x - 4y = 35
3(20/3) - 4y = 35
20 - 4y = 35
-4y = 35 - 20
-4y = 15
y = -15/4

solution is (20/3, -15/4)
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3 years ago
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